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1 /*-
2  * Copyright (c) 1993
3  *      The Regents of the University of California.  All rights reserved.
4  *
5  * This code is derived from software contributed to Berkeley by
6  * Paul Borman at Krystal Technologies.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  * 3. All advertising materials mentioning features or use of this software
17  *    must display the following acknowledgement:
18  *      This product includes software developed by the University of
19  *      California, Berkeley and its contributors.
20  * 4. Neither the name of the University nor the names of its contributors
21  *    may be used to endorse or promote products derived from this software
22  *    without specific prior written permission.
23  *
24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34  * SUCH DAMAGE.
35  */
36
37 #if defined(LIBC_SCCS) && !defined(lint)
38 static char sccsid[] = "@(#)rune.c      8.1 (Berkeley) 6/4/93";
39 #endif /* LIBC_SCCS and not lint */
40 #include <sys/cdefs.h>
41 __FBSDID("$FreeBSD$");
42
43 #include "namespace.h"
44 #include <arpa/inet.h>
45 #include <errno.h>
46 #include <runetype.h>
47 #include <stdio.h>
48 #include <string.h>
49 #include <stdlib.h>
50 #include <sys/types.h>
51 #include <sys/stat.h>
52 #include "un-namespace.h"
53
54 #include "runefile.h"
55
56 _RuneLocale *_Read_RuneMagi(FILE *);
57
58 _RuneLocale *
59 _Read_RuneMagi(FILE *fp)
60 {
61         char *fdata, *data;
62         void *lastp;
63         _FileRuneLocale *frl;
64         _RuneLocale *rl;
65         _FileRuneEntry *frr;
66         _RuneEntry *rr;
67         struct stat sb;
68         int x, saverr;
69         void *variable;
70         _FileRuneEntry *runetype_ext_ranges;
71         _FileRuneEntry *maplower_ext_ranges;
72         _FileRuneEntry *mapupper_ext_ranges;
73         int runetype_ext_len = 0;
74
75         if (_fstat(fileno(fp), &sb) < 0)
76                 return (NULL);
77
78         if ((size_t)sb.st_size < sizeof(_FileRuneLocale)) {
79                 errno = EFTYPE;
80                 return (NULL);
81         }
82
83         if ((fdata = malloc(sb.st_size)) == NULL)
84                 return (NULL);
85
86         errno = 0;
87         rewind(fp); /* Someone might have read the magic number once already */
88         if (errno) {
89                 saverr = errno;
90                 free(fdata);
91                 errno = saverr;
92                 return (NULL);
93         }
94
95         if (fread(fdata, sb.st_size, 1, fp) != 1) {
96                 saverr = errno;
97                 free(fdata);
98                 errno = saverr;
99                 return (NULL);
100         }
101
102         frl = (_FileRuneLocale *)fdata;
103         lastp = fdata + sb.st_size;
104
105         variable = frl + 1;
106
107         if (memcmp(frl->magic, _FILE_RUNE_MAGIC_1, sizeof(frl->magic))) {
108                 free(fdata);
109                 errno = EFTYPE;
110                 return (NULL);
111         }
112
113         frl->variable_len = ntohl(frl->variable_len);
114         frl->runetype_ext_nranges = ntohl(frl->runetype_ext_nranges);
115         frl->maplower_ext_nranges = ntohl(frl->maplower_ext_nranges);
116         frl->mapupper_ext_nranges = ntohl(frl->mapupper_ext_nranges);
117
118         for (x = 0; x < _CACHED_RUNES; ++x) {
119                 frl->runetype[x] = ntohl(frl->runetype[x]);
120                 frl->maplower[x] = ntohl(frl->maplower[x]);
121                 frl->mapupper[x] = ntohl(frl->mapupper[x]);
122         }
123
124         runetype_ext_ranges = (_FileRuneEntry *)variable;
125         variable = runetype_ext_ranges + frl->runetype_ext_nranges;
126         if (variable > lastp) {
127                 free(fdata);
128                 errno = EFTYPE;
129                 return (NULL);
130         }
131
132         maplower_ext_ranges = (_FileRuneEntry *)variable;
133         variable = maplower_ext_ranges + frl->maplower_ext_nranges;
134         if (variable > lastp) {
135                 free(fdata);
136                 errno = EFTYPE;
137                 return (NULL);
138         }
139
140         mapupper_ext_ranges = (_FileRuneEntry *)variable;
141         variable = mapupper_ext_ranges + frl->mapupper_ext_nranges;
142         if (variable > lastp) {
143                 free(fdata);
144                 errno = EFTYPE;
145                 return (NULL);
146         }
147
148         frr = runetype_ext_ranges;
149         for (x = 0; x < frl->runetype_ext_nranges; ++x) {
150                 uint32_t *types;
151
152                 frr[x].min = ntohl(frr[x].min);
153                 frr[x].max = ntohl(frr[x].max);
154                 frr[x].map = ntohl(frr[x].map);
155                 if (frr[x].map == 0) {
156                         int len = frr[x].max - frr[x].min + 1;
157                         types = variable;
158                         variable = types + len;
159                         runetype_ext_len += len;
160                         if (variable > lastp) {
161                                 free(fdata);
162                                 errno = EFTYPE;
163                                 return (NULL);
164                         }
165                         while (len-- > 0)
166                                 types[len] = ntohl(types[len]);
167                 }
168         }
169
170         frr = maplower_ext_ranges;
171         for (x = 0; x < frl->maplower_ext_nranges; ++x) {
172                 frr[x].min = ntohl(frr[x].min);
173                 frr[x].max = ntohl(frr[x].max);
174                 frr[x].map = ntohl(frr[x].map);
175         }
176
177         frr = mapupper_ext_ranges;
178         for (x = 0; x < frl->mapupper_ext_nranges; ++x) {
179                 frr[x].min = ntohl(frr[x].min);
180                 frr[x].max = ntohl(frr[x].max);
181                 frr[x].map = ntohl(frr[x].map);
182         }
183         if ((char *)variable + frl->variable_len > (char *)lastp) {
184                 free(fdata);
185                 errno = EFTYPE;
186                 return (NULL);
187         }
188
189         /*
190          * Convert from disk format to host format.
191          */
192         data = malloc(sizeof(_RuneLocale) +
193             (frl->runetype_ext_nranges + frl->maplower_ext_nranges +
194             frl->mapupper_ext_nranges) * sizeof(_RuneEntry) +
195             runetype_ext_len * sizeof(*rr->__types) +
196             frl->variable_len);
197         if (data == NULL) {
198                 saverr = errno;
199                 free(fdata);
200                 errno = saverr;
201                 return (NULL);
202         }
203
204         rl = (_RuneLocale *)data;
205         rl->__variable = rl + 1;
206
207         memcpy(rl->__magic, _RUNE_MAGIC_1, sizeof(rl->__magic));
208         memcpy(rl->__encoding, frl->encoding, sizeof(rl->__encoding));
209         rl->__invalid_rune = 0;
210
211         rl->__variable_len = frl->variable_len;
212         rl->__runetype_ext.__nranges = frl->runetype_ext_nranges;
213         rl->__maplower_ext.__nranges = frl->maplower_ext_nranges;
214         rl->__mapupper_ext.__nranges = frl->mapupper_ext_nranges;
215
216         for (x = 0; x < _CACHED_RUNES; ++x) {
217                 rl->__runetype[x] = frl->runetype[x];
218                 rl->__maplower[x] = frl->maplower[x];
219                 rl->__mapupper[x] = frl->mapupper[x];
220         }
221
222         rl->__runetype_ext.__ranges = (_RuneEntry *)rl->__variable;
223         rl->__variable = rl->__runetype_ext.__ranges +
224             rl->__runetype_ext.__nranges;
225
226         rl->__maplower_ext.__ranges = (_RuneEntry *)rl->__variable;
227         rl->__variable = rl->__maplower_ext.__ranges +
228             rl->__maplower_ext.__nranges;
229
230         rl->__mapupper_ext.__ranges = (_RuneEntry *)rl->__variable;
231         rl->__variable = rl->__mapupper_ext.__ranges +
232             rl->__mapupper_ext.__nranges;
233
234         variable = mapupper_ext_ranges + frl->mapupper_ext_nranges;
235         frr = runetype_ext_ranges;
236         rr = rl->__runetype_ext.__ranges;
237         for (x = 0; x < rl->__runetype_ext.__nranges; ++x) {
238                 uint32_t *types;
239
240                 rr[x].__min = frr[x].min;
241                 rr[x].__max = frr[x].max;
242                 rr[x].__map = frr[x].map;
243                 if (rr[x].__map == 0) {
244                         int len = rr[x].__max - rr[x].__min + 1;
245                         types = variable;
246                         variable = types + len;
247                         rr[x].__types = rl->__variable;
248                         rl->__variable = rr[x].__types + len;
249                         while (len-- > 0)
250                                 rr[x].__types[len] = types[len];
251                 } else
252                         rr[x].__types = NULL;
253         }
254
255         frr = maplower_ext_ranges;
256         rr = rl->__maplower_ext.__ranges;
257         for (x = 0; x < rl->__maplower_ext.__nranges; ++x) {
258                 rr[x].__min = frr[x].min;
259                 rr[x].__max = frr[x].max;
260                 rr[x].__map = frr[x].map;
261         }
262
263         frr = mapupper_ext_ranges;
264         rr = rl->__mapupper_ext.__ranges;
265         for (x = 0; x < rl->__mapupper_ext.__nranges; ++x) {
266                 rr[x].__min = frr[x].min;
267                 rr[x].__max = frr[x].max;
268                 rr[x].__map = frr[x].map;
269         }
270
271         memcpy(rl->__variable, variable, rl->__variable_len);
272         free(fdata);
273
274         /*
275          * Go out and zero pointers that should be zero.
276          */
277         if (!rl->__variable_len)
278                 rl->__variable = NULL;
279
280         if (!rl->__runetype_ext.__nranges)
281                 rl->__runetype_ext.__ranges = NULL;
282
283         if (!rl->__maplower_ext.__nranges)
284                 rl->__maplower_ext.__ranges = NULL;
285
286         if (!rl->__mapupper_ext.__nranges)
287                 rl->__mapupper_ext.__ranges = NULL;
288
289         return (rl);
290 }